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20109 Alicelandis (1995 RJ)
Classification: Main-belt Asteroid          SPK-ID: 2020109
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .237265912286294 7.7913e-08  
a 2.580842670377393 2.5852e-08 au
q 1.968496679722906 2.1218e-07 au
i 9.270590683144547 8.3786e-06 deg
node 103.522014503968 5.5525e-05 deg
peri 215.7874944475674 6.1759e-05 deg
M 40.30332838067077 3.3048e-05 deg
tp 2457430.957284440717
(2016-Feb-12.45728444)
0.00013728 JED
period 1514.400424323615
4.15
2.2754e-05
6.23e-08
d
yr
n .2377178414756379 3.5718e-09 deg/d
Q 3.19318866103188 3.1986e-08 au
  Orbit Determination Parameters
   # obs. used (total)      285  
   data-arc span      13509 days (36.99 yr)  
   first obs. used      1978-07-07  
   last obs. used      2015-07-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .66087  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:54:16  

Additional Information
 Earth MOID = .962719 au 
 Jupiter MOID = 2.12421 au 
 T_jup = 3.367 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5 mag n/a MPO337428  

20109 Alicelandis           Discovered 1995 Sept. 12 by J. L. Tonry at the Michgan-Dartmouth-MIT Observatory.
Alice Landis Tonry (b. 1921) was a graduate of Tufts Medical School, as well as a realtor, farmer and mother.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060413/MPCPages.arcLast Updated: 2006-04-17

[ show close-approach data ]
Alternate Designations
 1995 RJ = 1978 NT 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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